Frequently asked questions

Our Scientific Applications Support team has assembled a list of frequently asked questions to help you find answers quickly. Filter using one or more categories to focus on specific topics, or use the search bar to perform a text search.

FAQ categories

CRISPR genome editing

Custom DNA & RNA

Functional genomics

Genes & gene fragments

Next generation sequencing

Optional services

qPCR & PCR

Reagents & kits

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Why is your ordering system not recognizing the universal IUB codes I am using to specify mixed (degenerate, random, wobble) bases?

Be sure to use upper case letters (e.g., R, N, S) to denote mixed (degenerate, random, wobble) bases. Lower case letters are not recognized as they are used to denote certain modifications and RNA bases. The codes are provided here: